diff options
Diffstat (limited to 'rubbos/app/httpd-2.0.64/server/protocol.c')
| -rw-r--r-- | rubbos/app/httpd-2.0.64/server/protocol.c | 1573 |
1 files changed, 1573 insertions, 0 deletions
diff --git a/rubbos/app/httpd-2.0.64/server/protocol.c b/rubbos/app/httpd-2.0.64/server/protocol.c new file mode 100644 index 00000000..1e624f3d --- /dev/null +++ b/rubbos/app/httpd-2.0.64/server/protocol.c @@ -0,0 +1,1573 @@ +/* Licensed to the Apache Software Foundation (ASF) under one or more + * contributor license agreements. See the NOTICE file distributed with + * this work for additional information regarding copyright ownership. + * The ASF licenses this file to You under the Apache License, Version 2.0 + * (the "License"); you may not use this file except in compliance with + * the License. You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +/* + * http_protocol.c --- routines which directly communicate with the client. + * + * Code originally by Rob McCool; much redone by Robert S. Thau + * and the Apache Software Foundation. + */ + +#include "apr.h" +#include "apr_strings.h" +#include "apr_buckets.h" +#include "apr_lib.h" +#include "apr_signal.h" +#include "apr_strmatch.h" + +#define APR_WANT_STDIO /* for sscanf */ +#define APR_WANT_STRFUNC +#define APR_WANT_MEMFUNC +#include "apr_want.h" + +#define CORE_PRIVATE +#include "util_filter.h" +#include "ap_config.h" +#include "httpd.h" +#include "http_config.h" +#include "http_core.h" +#include "http_protocol.h" +#include "http_main.h" +#include "http_request.h" +#include "http_vhost.h" +#include "http_log.h" /* For errors detected in basic auth common + * support code... */ +#include "mod_core.h" +#include "util_charset.h" +#include "util_ebcdic.h" +#include "scoreboard.h" + +#if APR_HAVE_STDARG_H +#include <stdarg.h> +#endif +#if APR_HAVE_UNISTD_H +#include <unistd.h> +#endif + + +APR_HOOK_STRUCT( + APR_HOOK_LINK(post_read_request) + APR_HOOK_LINK(log_transaction) + APR_HOOK_LINK(http_method) + APR_HOOK_LINK(default_port) +) + +AP_DECLARE_DATA ap_filter_rec_t *ap_old_write_func = NULL; + + +/* Patterns to match in ap_make_content_type() */ +static const char *needcset[] = { + "text/plain", + "text/html", + NULL +}; +static const apr_strmatch_pattern **needcset_patterns; +static const apr_strmatch_pattern *charset_pattern; + +AP_DECLARE(void) ap_setup_make_content_type(apr_pool_t *pool) +{ + int i; + for (i = 0; needcset[i]; i++) { + continue; + } + needcset_patterns = (const apr_strmatch_pattern **) + apr_palloc(pool, (i + 1) * sizeof(apr_strmatch_pattern *)); + for (i = 0; needcset[i]; i++) { + needcset_patterns[i] = apr_strmatch_precompile(pool, needcset[i], 0); + } + needcset_patterns[i] = NULL; + charset_pattern = apr_strmatch_precompile(pool, "charset=", 0); +} + +/* + * Builds the content-type that should be sent to the client from the + * content-type specified. The following rules are followed: + * - if type is NULL, type is set to ap_default_type(r) + * - if charset adding is disabled, stop processing and return type. + * - then, if there are no parameters on type, add the default charset + * - return type + */ +AP_DECLARE(const char *)ap_make_content_type(request_rec *r, const char *type) +{ + const apr_strmatch_pattern **pcset; + core_dir_config *conf = + (core_dir_config *)ap_get_module_config(r->per_dir_config, + &core_module); + core_request_config *request_conf; + apr_size_t type_len; + + if (!type) { + type = ap_default_type(r); + } + + if (conf->add_default_charset != ADD_DEFAULT_CHARSET_ON) { + return type; + } + + request_conf = + ap_get_module_config(r->request_config, &core_module); + if (request_conf->suppress_charset) { + return type; + } + + type_len = strlen(type); + + if (apr_strmatch(charset_pattern, type, type_len) != NULL) { + /* already has parameter, do nothing */ + /* XXX we don't check the validity */ + ; + } + else { + /* see if it makes sense to add the charset. At present, + * we only add it if the Content-type is one of needcset[] + */ + for (pcset = needcset_patterns; *pcset ; pcset++) { + if (apr_strmatch(*pcset, type, type_len) != NULL) { + struct iovec concat[3]; + concat[0].iov_base = (void *)type; + concat[0].iov_len = type_len; + concat[1].iov_base = (void *)"; charset="; + concat[1].iov_len = sizeof("; charset=") - 1; + concat[2].iov_base = (void *)(conf->add_default_charset_name); + concat[2].iov_len = strlen(conf->add_default_charset_name); + type = apr_pstrcatv(r->pool, concat, 3, NULL); + break; + } + } + } + + return type; +} + +AP_DECLARE(void) ap_set_content_length(request_rec *r, apr_off_t clength) +{ + r->clength = clength; + apr_table_setn(r->headers_out, "Content-Length", + apr_off_t_toa(r->pool, clength)); +} + +/* + * Return the latest rational time from a request/mtime (modification time) + * pair. We return the mtime unless it's in the future, in which case we + * return the current time. We use the request time as a reference in order + * to limit the number of calls to time(). We don't check for futurosity + * unless the mtime is at least as new as the reference. + */ +AP_DECLARE(apr_time_t) ap_rationalize_mtime(request_rec *r, apr_time_t mtime) +{ + apr_time_t now; + + /* For all static responses, it's almost certain that the file was + * last modified before the beginning of the request. So there's + * no reason to call time(NULL) again. But if the response has been + * created on demand, then it might be newer than the time the request + * started. In this event we really have to call time(NULL) again + * so that we can give the clients the most accurate Last-Modified. If we + * were given a time in the future, we return the current time - the + * Last-Modified can't be in the future. + */ + now = (mtime < r->request_time) ? r->request_time : apr_time_now(); + return (mtime > now) ? now : mtime; +} + +/* Min # of bytes to allocate when reading a request line */ +#define MIN_LINE_ALLOC 80 + +/* Get a line of protocol input, including any continuation lines + * caused by MIME folding (or broken clients) if fold != 0, and place it + * in the buffer s, of size n bytes, without the ending newline. + * + * If s is NULL, ap_rgetline_core will allocate necessary memory from r->pool. + * + * Returns APR_SUCCESS if there are no problems and sets *read to be + * the full length of s. + * + * APR_ENOSPC is returned if there is not enough buffer space. + * Other errors may be returned on other errors. + * + * The LF is *not* returned in the buffer. Therefore, a *read of 0 + * indicates that an empty line was read. + * + * Notes: Because the buffer uses 1 char for NUL, the most we can return is + * (n - 1) actual characters. + * + * If no LF is detected on the last line due to a dropped connection + * or a full buffer, that's considered an error. + */ +AP_DECLARE(apr_status_t) ap_rgetline_core(char **s, apr_size_t n, + apr_size_t *read, request_rec *r, + int fold, apr_bucket_brigade *bb) +{ + apr_status_t rv; + apr_bucket *e; + apr_size_t bytes_handled = 0, current_alloc = 0; + char *pos, *last_char = *s; + int do_alloc = (*s == NULL), saw_eos = 0; + + /* + * Initialize last_char as otherwise a random value will be compared + * against APR_ASCII_LF at the end of the loop if bb only contains + * zero-length buckets. + */ + if (last_char) + *last_char = '\0'; + + for (;;) { + apr_brigade_cleanup(bb); + rv = ap_get_brigade(r->input_filters, bb, AP_MODE_GETLINE, + APR_BLOCK_READ, 0); + + if (rv != APR_SUCCESS) { + return rv; + } + + /* Something horribly wrong happened. Someone didn't block! */ + if (APR_BRIGADE_EMPTY(bb)) { + return APR_EGENERAL; + } + + APR_BRIGADE_FOREACH(e, bb) { + const char *str; + apr_size_t len; + + /* If we see an EOS, don't bother doing anything more. */ + if (APR_BUCKET_IS_EOS(e)) { + saw_eos = 1; + break; + } + + rv = apr_bucket_read(e, &str, &len, APR_BLOCK_READ); + + if (rv != APR_SUCCESS) { + return rv; + } + + if (len == 0) { + /* no use attempting a zero-byte alloc (hurts when + * using --with-efence --enable-pool-debug) or + * doing any of the other logic either + */ + continue; + } + + /* Would this overrun our buffer? If so, we'll die. */ + if (n < bytes_handled + len) { + *read = bytes_handled; + if (*s) { + /* ensure this string is NUL terminated */ + if (bytes_handled > 0) { + (*s)[bytes_handled-1] = '\0'; + } + else { + (*s)[0] = '\0'; + } + } + return APR_ENOSPC; + } + + /* Do we have to handle the allocation ourselves? */ + if (do_alloc) { + /* We'll assume the common case where one bucket is enough. */ + if (!*s) { + current_alloc = len; + if (current_alloc < MIN_LINE_ALLOC) { + current_alloc = MIN_LINE_ALLOC; + } + *s = apr_palloc(r->pool, current_alloc); + } + else if (bytes_handled + len > current_alloc) { + /* Increase the buffer size */ + apr_size_t new_size = current_alloc * 2; + char *new_buffer; + + if (bytes_handled + len > new_size) { + new_size = (bytes_handled + len) * 2; + } + + new_buffer = apr_palloc(r->pool, new_size); + + /* Copy what we already had. */ + memcpy(new_buffer, *s, bytes_handled); + current_alloc = new_size; + *s = new_buffer; + } + } + + /* Just copy the rest of the data to the end of the old buffer. */ + pos = *s + bytes_handled; + memcpy(pos, str, len); + last_char = pos + len - 1; + + /* We've now processed that new data - update accordingly. */ + bytes_handled += len; + } + + /* If we got a full line of input, stop reading */ + if (last_char && (*last_char == APR_ASCII_LF)) { + break; + } + } + + /* Now NUL-terminate the string at the end of the line; + * if the last-but-one character is a CR, terminate there */ + if (last_char > *s && last_char[-1] == APR_ASCII_CR) { + last_char--; + } + *last_char = '\0'; + bytes_handled = last_char - *s; + + /* If we're folding, we have more work to do. + * + * Note that if an EOS was seen, we know we can't have another line. + */ + if (fold && bytes_handled && !saw_eos) { + for (;;) { + const char *str; + apr_size_t len; + char c; + + /* Clear the temp brigade for this filter read. */ + apr_brigade_cleanup(bb); + + /* We only care about the first byte. */ + rv = ap_get_brigade(r->input_filters, bb, AP_MODE_SPECULATIVE, + APR_BLOCK_READ, 1); + + if (rv != APR_SUCCESS) { + return rv; + } + + if (APR_BRIGADE_EMPTY(bb)) { + break; + } + + e = APR_BRIGADE_FIRST(bb); + + /* If we see an EOS, don't bother doing anything more. */ + if (APR_BUCKET_IS_EOS(e)) { + break; + } + + rv = apr_bucket_read(e, &str, &len, APR_BLOCK_READ); + + if (rv != APR_SUCCESS) { + apr_brigade_cleanup(bb); + return rv; + } + + /* Found one, so call ourselves again to get the next line. + * + * FIXME: If the folding line is completely blank, should we + * stop folding? Does that require also looking at the next + * char? + */ + /* When we call destroy, the buckets are deleted, so save that + * one character we need. This simplifies our execution paths + * at the cost of one character read. + */ + c = *str; + if (c == APR_ASCII_BLANK || c == APR_ASCII_TAB) { + /* Do we have enough space? We may be full now. */ + if (bytes_handled >= n) { + *read = n; + /* ensure this string is terminated */ + (*s)[n-1] = '\0'; + return APR_ENOSPC; + } + else { + apr_size_t next_size, next_len; + char *tmp; + + /* If we're doing the allocations for them, we have to + * give ourselves a NULL and copy it on return. + */ + if (do_alloc) { + tmp = NULL; + } else { + /* We're null terminated. */ + tmp = last_char; + } + + next_size = n - bytes_handled; + + rv = ap_rgetline_core(&tmp, next_size, + &next_len, r, 0, bb); + + if (rv != APR_SUCCESS) { + return rv; + } + + if (do_alloc && next_len > 0) { + char *new_buffer; + apr_size_t new_size = bytes_handled + next_len + 1; + + /* we need to alloc an extra byte for a null */ + new_buffer = apr_palloc(r->pool, new_size); + + /* Copy what we already had. */ + memcpy(new_buffer, *s, bytes_handled); + + /* copy the new line, including the trailing null */ + memcpy(new_buffer + bytes_handled, tmp, next_len + 1); + *s = new_buffer; + } + + bytes_handled += next_len; + } + } + else { /* next character is not tab or space */ + break; + } + } + } + + *read = bytes_handled; + return APR_SUCCESS; +} + +#if APR_CHARSET_EBCDIC +AP_DECLARE(apr_status_t) ap_rgetline(char **s, apr_size_t n, + apr_size_t *read, request_rec *r, + int fold, apr_bucket_brigade *bb) +{ + /* on ASCII boxes, ap_rgetline is a macro which simply invokes + * ap_rgetline_core with the same parms + * + * on EBCDIC boxes, each complete http protocol input line needs to be + * translated into the code page used by the compiler. Since + * ap_rgetline_core uses recursion, we do the translation in a wrapper + * function to insure that each input character gets translated only once. + */ + apr_status_t rv; + + rv = ap_rgetline_core(s, n, read, r, fold, bb); + if (rv == APR_SUCCESS) { + ap_xlate_proto_from_ascii(*s, *read); + } + return rv; +} +#endif + +AP_DECLARE(int) ap_getline(char *s, int n, request_rec *r, int fold) +{ + char *tmp_s = s; + apr_status_t rv; + apr_size_t len; + apr_bucket_brigade *tmp_bb; + + tmp_bb = apr_brigade_create(r->pool, r->connection->bucket_alloc); + rv = ap_rgetline(&tmp_s, n, &len, r, fold, tmp_bb); + apr_brigade_destroy(tmp_bb); + + /* Map the out-of-space condition to the old API. */ + if (rv == APR_ENOSPC) { + return n; + } + + /* Anything else is just bad. */ + if (rv != APR_SUCCESS) { + return -1; + } + + return (int)len; +} + +/* parse_uri: break apart the uri + * Side Effects: + * - sets r->args to rest after '?' (or NULL if no '?') + * - sets r->uri to request uri (without r->args part) + * - sets r->hostname (if not set already) from request (scheme://host:port) + */ +AP_CORE_DECLARE(void) ap_parse_uri(request_rec *r, const char *uri) +{ + int status = HTTP_OK; + + r->unparsed_uri = apr_pstrdup(r->pool, uri); + + if (r->method_number == M_CONNECT) { + status = apr_uri_parse_hostinfo(r->pool, uri, &r->parsed_uri); + } + else { + /* Simple syntax Errors in URLs are trapped by + * parse_uri_components(). + */ + status = apr_uri_parse(r->pool, uri, &r->parsed_uri); + } + + if (status == APR_SUCCESS) { + /* if it has a scheme we may need to do absoluteURI vhost stuff */ + if (r->parsed_uri.scheme + && !strcasecmp(r->parsed_uri.scheme, ap_http_method(r))) { + r->hostname = r->parsed_uri.hostname; + } + else if (r->method_number == M_CONNECT) { + r->hostname = r->parsed_uri.hostname; + } + + r->args = r->parsed_uri.query; + r->uri = r->parsed_uri.path ? r->parsed_uri.path + : apr_pstrdup(r->pool, "/"); + +#if defined(OS2) || defined(WIN32) + /* Handle path translations for OS/2 and plug security hole. + * This will prevent "http://www.wherever.com/..\..\/" from + * returning a directory for the root drive. + */ + { + char *x; + + for (x = r->uri; (x = strchr(x, '\\')) != NULL; ) + *x = '/'; + } +#endif /* OS2 || WIN32 */ + } + else { + r->args = NULL; + r->hostname = NULL; + r->status = HTTP_BAD_REQUEST; /* set error status */ + r->uri = apr_pstrdup(r->pool, uri); + } +} + +static int read_request_line(request_rec *r, apr_bucket_brigade *bb) +{ + const char *ll; + const char *uri; + const char *pro; + +#if 0 + conn_rec *conn = r->connection; +#endif + int major = 1, minor = 0; /* Assume HTTP/1.0 if non-"HTTP" protocol */ + char http[5]; + apr_size_t len; + int num_blank_lines = 0; + int max_blank_lines = r->server->limit_req_fields; + + if (max_blank_lines <= 0) { + max_blank_lines = DEFAULT_LIMIT_REQUEST_FIELDS; + } + + /* Read past empty lines until we get a real request line, + * a read error, the connection closes (EOF), or we timeout. + * + * We skip empty lines because browsers have to tack a CRLF on to the end + * of POSTs to support old CERN webservers. But note that we may not + * have flushed any previous response completely to the client yet. + * We delay the flush as long as possible so that we can improve + * performance for clients that are pipelining requests. If a request + * is pipelined then we won't block during the (implicit) read() below. + * If the requests aren't pipelined, then the client is still waiting + * for the final buffer flush from us, and we will block in the implicit + * read(). B_SAFEREAD ensures that the BUFF layer flushes if it will + * have to block during a read. + */ + + do { + apr_status_t rv; + + /* insure ap_rgetline allocates memory each time thru the loop + * if there are empty lines + */ + r->the_request = NULL; + rv = ap_rgetline(&(r->the_request), (apr_size_t)(r->server->limit_req_line + 2), + &len, r, 0, bb); + + if (rv != APR_SUCCESS) { + r->request_time = apr_time_now(); + + /* ap_rgetline returns APR_ENOSPC if it fills up the + * buffer before finding the end-of-line. This is only going to + * happen if it exceeds the configured limit for a request-line. + */ + if (rv == APR_ENOSPC) { + r->status = HTTP_REQUEST_URI_TOO_LARGE; + r->proto_num = HTTP_VERSION(1,0); + r->protocol = apr_pstrdup(r->pool, "HTTP/1.0"); + } + + return 0; + } + } while ((len <= 0) && (++num_blank_lines < max_blank_lines)); + + /* we've probably got something to do, ignore graceful restart requests */ + + r->request_time = apr_time_now(); + ll = r->the_request; + r->method = ap_getword_white(r->pool, &ll); + +#if 0 +/* XXX If we want to keep track of the Method, the protocol module should do + * it. That support isn't in the scoreboard yet. Hopefully next week + * sometime. rbb */ + ap_update_connection_status(AP_CHILD_THREAD_FROM_ID(conn->id), "Method", + r->method); +#endif + + uri = ap_getword_white(r->pool, &ll); + + /* Provide quick information about the request method as soon as known */ + + r->method_number = ap_method_number_of(r->method); + if (r->method_number == M_GET && r->method[0] == 'H') { + r->header_only = 1; + } + + ap_parse_uri(r, uri); + + if (ll[0]) { + r->assbackwards = 0; + pro = ll; + len = strlen(ll); + } else { + r->assbackwards = 1; + pro = "HTTP/0.9"; + len = 8; + } + r->protocol = apr_pstrmemdup(r->pool, pro, len); + + /* XXX ap_update_connection_status(conn->id, "Protocol", r->protocol); */ + + /* Avoid sscanf in the common case */ + if (len == 8 + && pro[0] == 'H' && pro[1] == 'T' && pro[2] == 'T' && pro[3] == 'P' + && pro[4] == '/' && apr_isdigit(pro[5]) && pro[6] == '.' + && apr_isdigit(pro[7])) { + r->proto_num = HTTP_VERSION(pro[5] - '0', pro[7] - '0'); + } + else if (3 == sscanf(r->protocol, "%4s/%u.%u", http, &major, &minor) + && (strcasecmp("http", http) == 0) + && (minor < HTTP_VERSION(1, 0)) ) /* don't allow HTTP/0.1000 */ + r->proto_num = HTTP_VERSION(major, minor); + else + r->proto_num = HTTP_VERSION(1, 0); + + return 1; +} + +AP_DECLARE(void) ap_get_mime_headers_core(request_rec *r, apr_bucket_brigade *bb) +{ + char *last_field = NULL; + apr_size_t last_len = 0; + apr_size_t alloc_len = 0; + char *field; + char *value; + apr_size_t len; + int fields_read = 0; + char *tmp_field; + + /* + * Read header lines until we get the empty separator line, a read error, + * the connection closes (EOF), reach the server limit, or we timeout. + */ + while(1) { + apr_status_t rv; + int folded = 0; + + field = NULL; + rv = ap_rgetline(&field, r->server->limit_req_fieldsize + 2, + &len, r, 0, bb); + + /* ap_rgetline returns APR_ENOSPC if it fills up the buffer before + * finding the end-of-line. This is only going to happen if it + * exceeds the configured limit for a field size. + */ + if (rv == APR_ENOSPC && field) { + r->status = HTTP_BAD_REQUEST; + /* insure ap_escape_html will terminate correctly */ + field[len - 1] = '\0'; + apr_table_setn(r->notes, "error-notes", + apr_pstrcat(r->pool, + "Size of a request header field " + "exceeds server limit.<br />\n" + "<pre>\n", + ap_escape_html(r->pool, field), + "</pre>\n", NULL)); + return; + } + + if (rv != APR_SUCCESS) { + r->status = HTTP_BAD_REQUEST; + return; + } + + if (last_field != NULL) { + if ((len > 0) && ((*field == '\t') || *field == ' ')) { + /* This line is a continuation of the preceding line(s), + * so append it to the line that we've set aside. + * Note: this uses a power-of-two allocator to avoid + * doing O(n) allocs and using O(n^2) space for + * continuations that span many many lines. + */ + apr_size_t fold_len = last_len + len + 1; /* trailing null */ + + if ((fold_len - 1) > r->server->limit_req_fieldsize) { + r->status = HTTP_BAD_REQUEST; + /* report what we have accumulated so far before the + * overflow (last_field) as the field with the problem + */ + apr_table_setn(r->notes, "error-notes", + apr_pstrcat(r->pool, + "Size of a request header field " + "after folding " + "exceeds server limit.<br />\n" + "<pre>\n", + ap_escape_html(r->pool, last_field), + "</pre>\n", NULL)); + return; + } + + if (fold_len > alloc_len) { + char *fold_buf; + alloc_len += alloc_len; + if (fold_len > alloc_len) { + alloc_len = fold_len; + } + fold_buf = (char *)apr_palloc(r->pool, alloc_len); + memcpy(fold_buf, last_field, last_len); + last_field = fold_buf; + } + memcpy(last_field + last_len, field, len +1); /* +1 for nul */ + last_len += len; + folded = 1; + } + else /* not a continuation line */ { + + if (r->server->limit_req_fields + && (++fields_read > r->server->limit_req_fields)) { + r->status = HTTP_BAD_REQUEST; + apr_table_setn(r->notes, "error-notes", + "The number of request header fields " + "exceeds this server's limit."); + return; + } + + if (!(value = strchr(last_field, ':'))) { /* Find ':' or */ + r->status = HTTP_BAD_REQUEST; /* abort bad request */ + apr_table_setn(r->notes, "error-notes", + apr_pstrcat(r->pool, + "Request header field is " + "missing ':' separator.<br />\n" + "<pre>\n", + ap_escape_html(r->pool, + last_field), + "</pre>\n", NULL)); + return; + } + + tmp_field = value - 1; /* last character of field-name */ + + *value++ = '\0'; /* NUL-terminate at colon */ + + while (*value == ' ' || *value == '\t') { + ++value; /* Skip to start of value */ + } + + /* Strip LWS after field-name: */ + while (tmp_field > last_field + && (*tmp_field == ' ' || *tmp_field == '\t')) { + *tmp_field-- = '\0'; + } + + /* Strip LWS after field-value: */ + tmp_field = last_field + last_len - 1; + while (tmp_field > value + && (*tmp_field == ' ' || *tmp_field == '\t')) { + *tmp_field-- = '\0'; + } + + apr_table_addn(r->headers_in, last_field, value); + + /* reset the alloc_len so that we'll allocate a new + * buffer if we have to do any more folding: we can't + * use the previous buffer because its contents are + * now part of r->headers_in + */ + alloc_len = 0; + + } /* end if current line is not a continuation starting with tab */ + } + + /* Found a blank line, stop. */ + if (len == 0) { + break; + } + + /* Keep track of this line so that we can parse it on + * the next loop iteration. (In the folded case, last_field + * has been updated already.) + */ + if (!folded) { + last_field = field; + last_len = len; + } + } + + apr_table_compress(r->headers_in, APR_OVERLAP_TABLES_MERGE); +} + +AP_DECLARE(void) ap_get_mime_headers(request_rec *r) +{ + apr_bucket_brigade *tmp_bb; + tmp_bb = apr_brigade_create(r->pool, r->connection->bucket_alloc); + ap_get_mime_headers_core(r, tmp_bb); + apr_brigade_destroy(tmp_bb); +} + +request_rec *ap_read_request(conn_rec *conn) +{ + request_rec *r; + apr_pool_t *p; + const char *expect; + int access_status; + apr_bucket_brigade *tmp_bb; + + apr_pool_create(&p, conn->pool); + apr_pool_tag(p, "request"); + r = apr_pcalloc(p, sizeof(request_rec)); + r->pool = p; + r->connection = conn; + r->server = conn->base_server; + + r->user = NULL; + r->ap_auth_type = NULL; + + r->allowed_methods = ap_make_method_list(p, 2); + + r->headers_in = apr_table_make(r->pool, 25); + r->subprocess_env = apr_table_make(r->pool, 25); + r->headers_out = apr_table_make(r->pool, 12); + r->err_headers_out = apr_table_make(r->pool, 5); + r->notes = apr_table_make(r->pool, 5); + + r->request_config = ap_create_request_config(r->pool); + /* Must be set before we run create request hook */ + + r->proto_output_filters = conn->output_filters; + r->output_filters = r->proto_output_filters; + r->proto_input_filters = conn->input_filters; + r->input_filters = r->proto_input_filters; + ap_run_create_request(r); + r->per_dir_config = r->server->lookup_defaults; + + r->sent_bodyct = 0; /* bytect isn't for body */ + + r->read_length = 0; + r->read_body = REQUEST_NO_BODY; + + r->status = HTTP_REQUEST_TIME_OUT; /* Until we get a request */ + r->the_request = NULL; + + tmp_bb = apr_brigade_create(r->pool, r->connection->bucket_alloc); + + /* Get the request... */ + if (!read_request_line(r, tmp_bb)) { + if (r->status == HTTP_REQUEST_URI_TOO_LARGE) { + ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, + "request failed: URI too long (longer than %d)", r->server->limit_req_line); + ap_send_error_response(r, 0); + ap_update_child_status(conn->sbh, SERVER_BUSY_LOG, r); + ap_run_log_transaction(r); + apr_brigade_destroy(tmp_bb); + return r; + } + + apr_brigade_destroy(tmp_bb); + return NULL; + } + + if (!r->assbackwards) { + ap_get_mime_headers_core(r, tmp_bb); + if (r->status != HTTP_REQUEST_TIME_OUT) { + ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, + "request failed: error reading the headers"); + ap_send_error_response(r, 0); + ap_update_child_status(conn->sbh, SERVER_BUSY_LOG, r); + ap_run_log_transaction(r); + apr_brigade_destroy(tmp_bb); + return r; + } + + if (apr_table_get(r->headers_in, "Transfer-Encoding") + && apr_table_get(r->headers_in, "Content-Length")) { + /* 2616 section 4.4, point 3: "if both Transfer-Encoding + * and Content-Length are received, the latter MUST be + * ignored"; so unset it here to prevent any confusion + * later. */ + apr_table_unset(r->headers_in, "Content-Length"); + } + } + else { + if (r->header_only) { + /* + * Client asked for headers only with HTTP/0.9, which doesn't send + * headers! Have to dink things just to make sure the error message + * comes through... + */ + ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, + "client sent invalid HTTP/0.9 request: HEAD %s", + r->uri); + r->header_only = 0; + r->status = HTTP_BAD_REQUEST; + ap_send_error_response(r, 0); + ap_update_child_status(conn->sbh, SERVER_BUSY_LOG, r); + ap_run_log_transaction(r); + apr_brigade_destroy(tmp_bb); + return r; + } + } + + apr_brigade_destroy(tmp_bb); + + r->status = HTTP_OK; /* Until further notice. */ + + /* update what we think the virtual host is based on the headers we've + * now read. may update status. + */ + ap_update_vhost_from_headers(r); + + /* we may have switched to another server */ + r->per_dir_config = r->server->lookup_defaults; + + if ((!r->hostname && (r->proto_num >= HTTP_VERSION(1, 1))) + || ((r->proto_num == HTTP_VERSION(1, 1)) + && !apr_table_get(r->headers_in, "Host"))) { + /* + * Client sent us an HTTP/1.1 or later request without telling us the + * hostname, either with a full URL or a Host: header. We therefore + * need to (as per the 1.1 spec) send an error. As a special case, + * HTTP/1.1 mentions twice (S9, S14.23) that a request MUST contain + * a Host: header, and the server MUST respond with 400 if it doesn't. + */ + r->status = HTTP_BAD_REQUEST; + ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, + "client sent HTTP/1.1 request without hostname " + "(see RFC2616 section 14.23): %s", r->uri); + } + + if (r->status != HTTP_OK) { + ap_send_error_response(r, 0); + ap_update_child_status(conn->sbh, SERVER_BUSY_LOG, r); + ap_run_log_transaction(r); + return r; + } + + if (((expect = apr_table_get(r->headers_in, "Expect")) != NULL) + && (expect[0] != '\0')) { + /* + * The Expect header field was added to HTTP/1.1 after RFC 2068 + * as a means to signal when a 100 response is desired and, + * unfortunately, to signal a poor man's mandatory extension that + * the server must understand or return 417 Expectation Failed. + */ + if (strcasecmp(expect, "100-continue") == 0) { + r->expecting_100 = 1; + } + else { + r->status = HTTP_EXPECTATION_FAILED; + ap_log_rerror(APLOG_MARK, APLOG_INFO, 0, r, + "client sent an unrecognized expectation value of " + "Expect: %s", expect); + ap_send_error_response(r, 0); + ap_update_child_status(conn->sbh, SERVER_BUSY_LOG, r); + ap_run_log_transaction(r); + return r; + } + } + + ap_add_input_filter_handle(ap_http_input_filter_handle, + NULL, r, r->connection); + + if ((access_status = ap_run_post_read_request(r))) { + ap_die(access_status, r); + ap_update_child_status(conn->sbh, SERVER_BUSY_LOG, r); + ap_run_log_transaction(r); + return NULL; + } + + return r; +} + +/* + * A couple of other functions which initialize some of the fields of + * a request structure, as appropriate for adjuncts of one kind or another + * to a request in progress. Best here, rather than elsewhere, since + * *someone* has to set the protocol-specific fields... + */ + +AP_DECLARE(void) ap_set_sub_req_protocol(request_rec *rnew, + const request_rec *r) +{ + rnew->the_request = r->the_request; /* Keep original request-line */ + + rnew->assbackwards = 1; /* Don't send headers from this. */ + rnew->no_local_copy = 1; /* Don't try to send HTTP_NOT_MODIFIED for a + * fragment. */ + rnew->method = "GET"; + rnew->method_number = M_GET; + rnew->protocol = "INCLUDED"; + + rnew->status = HTTP_OK; + + rnew->headers_in = apr_table_copy(rnew->pool, r->headers_in); + rnew->subprocess_env = apr_table_copy(rnew->pool, r->subprocess_env); + rnew->headers_out = apr_table_make(rnew->pool, 5); + rnew->err_headers_out = apr_table_make(rnew->pool, 5); + rnew->notes = apr_table_make(rnew->pool, 5); + + rnew->expecting_100 = r->expecting_100; + rnew->read_length = r->read_length; + rnew->read_body = REQUEST_NO_BODY; + + rnew->main = (request_rec *) r; +} + +static void end_output_stream(request_rec *r) +{ + conn_rec *c = r->connection; + apr_bucket_brigade *bb; + apr_bucket *b; + + bb = apr_brigade_create(r->pool, c->bucket_alloc); + b = apr_bucket_eos_create(c->bucket_alloc); + APR_BRIGADE_INSERT_TAIL(bb, b); + ap_pass_brigade(r->output_filters, bb); +} + +AP_DECLARE(void) ap_finalize_sub_req_protocol(request_rec *sub) +{ + /* tell the filter chain there is no more content coming */ + if (!sub->eos_sent) { + end_output_stream(sub); + } +} + +/* finalize_request_protocol is called at completion of sending the + * response. Its sole purpose is to send the terminating protocol + * information for any wrappers around the response message body + * (i.e., transfer encodings). It should have been named finalize_response. + */ +AP_DECLARE(void) ap_finalize_request_protocol(request_rec *r) +{ + (void) ap_discard_request_body(r); + + /* tell the filter chain there is no more content coming */ + if (!r->eos_sent) { + end_output_stream(r); + } +} + +/* + * Support for the Basic authentication protocol, and a bit for Digest. + */ +AP_DECLARE(void) ap_note_auth_failure(request_rec *r) +{ + const char *type = ap_auth_type(r); + if (type) { + if (!strcasecmp(type, "Basic")) + ap_note_basic_auth_failure(r); + else if (!strcasecmp(type, "Digest")) + ap_note_digest_auth_failure(r); + } + else { + ap_log_rerror(APLOG_MARK, APLOG_ERR, + 0, r, "need AuthType to note auth failure: %s", r->uri); + } +} + +AP_DECLARE(void) ap_note_basic_auth_failure(request_rec *r) +{ + const char *type = ap_auth_type(r); + + /* if there is no AuthType configure or it is something other than + * Basic, let ap_note_auth_failure() deal with it + */ + if (!type || strcasecmp(type, "Basic")) + ap_note_auth_failure(r); + else + apr_table_setn(r->err_headers_out, + (PROXYREQ_PROXY == r->proxyreq) ? "Proxy-Authenticate" + : "WWW-Authenticate", + apr_pstrcat(r->pool, "Basic realm=\"", ap_auth_name(r), + "\"", NULL)); +} + +AP_DECLARE(void) ap_note_digest_auth_failure(request_rec *r) +{ + apr_table_setn(r->err_headers_out, + (PROXYREQ_PROXY == r->proxyreq) ? "Proxy-Authenticate" + : "WWW-Authenticate", + /* need APR_TIME_T_FMT_HEX */ + apr_psprintf(r->pool, "Digest realm=\"%s\", nonce=\"%llx\"", + ap_auth_name(r), r->request_time)); +} + +AP_DECLARE(int) ap_get_basic_auth_pw(request_rec *r, const char **pw) +{ + const char *auth_line = apr_table_get(r->headers_in, + (PROXYREQ_PROXY == r->proxyreq) + ? "Proxy-Authorization" + : "Authorization"); + const char *t; + + if (!(t = ap_auth_type(r)) || strcasecmp(t, "Basic")) + return DECLINED; + + if (!ap_auth_name(r)) { + ap_log_rerror(APLOG_MARK, APLOG_ERR, + 0, r, "need AuthName: %s", r->uri); + return HTTP_INTERNAL_SERVER_ERROR; + } + + if (!auth_line) { + ap_note_basic_auth_failure(r); + return HTTP_UNAUTHORIZED; + } + + if (strcasecmp(ap_getword(r->pool, &auth_line, ' '), "Basic")) { + /* Client tried to authenticate using wrong auth scheme */ + ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, + "client used wrong authentication scheme: %s", r->uri); + ap_note_basic_auth_failure(r); + return HTTP_UNAUTHORIZED; + } + + while (*auth_line == ' ' || *auth_line == '\t') { + auth_line++; + } + + t = ap_pbase64decode(r->pool, auth_line); + r->user = ap_getword_nulls (r->pool, &t, ':'); + r->ap_auth_type = "Basic"; + + *pw = t; + + return OK; +} + +struct content_length_ctx { + int data_sent; /* true if the C-L filter has already sent at + * least one bucket on to the next output filter + * for this request + */ +}; + +/* This filter computes the content length, but it also computes the number + * of bytes sent to the client. This means that this filter will always run + * through all of the buckets in all brigades + */ +AP_CORE_DECLARE_NONSTD(apr_status_t) ap_content_length_filter( + ap_filter_t *f, + apr_bucket_brigade *b) +{ + request_rec *r = f->r; + struct content_length_ctx *ctx; + apr_bucket *e; + int eos = 0; + apr_read_type_e eblock = APR_NONBLOCK_READ; + + ctx = f->ctx; + if (!ctx) { + f->ctx = ctx = apr_palloc(r->pool, sizeof(*ctx)); + ctx->data_sent = 0; + } + + /* Loop through this set of buckets to compute their length + */ + e = APR_BRIGADE_FIRST(b); + while (e != APR_BRIGADE_SENTINEL(b)) { + if (APR_BUCKET_IS_EOS(e)) { + eos = 1; + break; + } + if (e->length == (apr_size_t)-1) { + apr_size_t len; + const char *ignored; + apr_status_t rv; + + /* This is probably a pipe bucket. Send everything + * prior to this, and then read the data for this bucket. + */ + rv = apr_bucket_read(e, &ignored, &len, eblock); + if (rv == APR_SUCCESS) { + /* Attempt a nonblocking read next time through */ + eblock = APR_NONBLOCK_READ; + r->bytes_sent += len; + } + else if (APR_STATUS_IS_EAGAIN(rv)) { + /* Output everything prior to this bucket, and then + * do a blocking read on the next batch. + */ + if (e != APR_BRIGADE_FIRST(b)) { + apr_bucket_brigade *split = apr_brigade_split(b, e); + apr_bucket *flush = apr_bucket_flush_create(r->connection->bucket_alloc); + + APR_BRIGADE_INSERT_TAIL(b, flush); + rv = ap_pass_brigade(f->next, b); + if (rv != APR_SUCCESS || f->c->aborted) { + apr_brigade_destroy(split); + return rv; + } + b = split; + e = APR_BRIGADE_FIRST(b); + + ctx->data_sent = 1; + } + eblock = APR_BLOCK_READ; + continue; + } + else { + ap_log_rerror(APLOG_MARK, APLOG_ERR, rv, r, + "ap_content_length_filter: " + "apr_bucket_read() failed"); + return rv; + } + } + else { + r->bytes_sent += e->length; + } + e = APR_BUCKET_NEXT(e); + } + + /* If we've now seen the entire response and it's otherwise + * okay to set the C-L in the response header, then do so now. + * + * We can only set a C-L in the response header if we haven't already + * sent any buckets on to the next output filter for this request. + */ + if (ctx->data_sent == 0 && eos && + /* don't whack the C-L if it has already been set for a HEAD + * by something like proxy. the brigade only has an EOS bucket + * in this case, making r->bytes_sent zero. + * + * if r->bytes_sent > 0 we have a (temporary) body whose length may + * have been changed by a filter. the C-L header might not have been + * updated so we do it here. long term it would be cleaner to have + * such filters update or remove the C-L header, and just use it + * if present. + */ + !(r->header_only && r->bytes_sent == 0 && + apr_table_get(r->headers_out, "Content-Length"))) { + ap_set_content_length(r, r->bytes_sent); + } + + ctx->data_sent = 1; + return ap_pass_brigade(f->next, b); +} + +/* + * Send the body of a response to the client. + */ +AP_DECLARE(apr_status_t) ap_send_fd(apr_file_t *fd, request_rec *r, + apr_off_t offset, apr_size_t len, + apr_size_t *nbytes) +{ + conn_rec *c = r->connection; + apr_bucket_brigade *bb = NULL; + apr_bucket *b; + apr_status_t rv; + + bb = apr_brigade_create(r->pool, c->bucket_alloc); + b = apr_bucket_file_create(fd, offset, len, r->pool, c->bucket_alloc); + APR_BRIGADE_INSERT_TAIL(bb, b); + + rv = ap_pass_brigade(r->output_filters, bb); + if (rv != APR_SUCCESS) { + *nbytes = 0; /* no way to tell how many were actually sent */ + } + else { + *nbytes = len; + } + + return rv; +} + +#if APR_HAS_MMAP +/* send data from an in-memory buffer */ +AP_DECLARE(size_t) ap_send_mmap(apr_mmap_t *mm, request_rec *r, size_t offset, + size_t length) +{ + conn_rec *c = r->connection; + apr_bucket_brigade *bb = NULL; + apr_bucket *b; + + bb = apr_brigade_create(r->pool, c->bucket_alloc); + b = apr_bucket_mmap_create(mm, offset, length, c->bucket_alloc); + APR_BRIGADE_INSERT_TAIL(bb, b); + ap_pass_brigade(r->output_filters, bb); + + return mm->size; /* XXX - change API to report apr_status_t? */ +} +#endif /* APR_HAS_MMAP */ + +typedef struct { + apr_bucket_brigade *bb; +} old_write_filter_ctx; + +AP_CORE_DECLARE_NONSTD(apr_status_t) ap_old_write_filter( + ap_filter_t *f, apr_bucket_brigade *bb) +{ + old_write_filter_ctx *ctx = f->ctx; + + AP_DEBUG_ASSERT(ctx); + + if (ctx->bb != 0) { + /* whatever is coming down the pipe (we don't care), we + * can simply insert our buffered data at the front and + * pass the whole bundle down the chain. + */ + APR_BRIGADE_CONCAT(ctx->bb, bb); + bb = ctx->bb; + ctx->bb = NULL; + } + + return ap_pass_brigade(f->next, bb); +} + +static apr_status_t buffer_output(request_rec *r, + const char *str, apr_size_t len) +{ + conn_rec *c = r->connection; + ap_filter_t *f; + old_write_filter_ctx *ctx; + + if (len == 0) + return APR_SUCCESS; + + /* future optimization: record some flags in the request_rec to + * say whether we've added our filter, and whether it is first. + */ + + /* this will typically exit on the first test */ + for (f = r->output_filters; f != NULL; f = f->next) { + if (ap_old_write_func == f->frec) + break; + } + + if (f == NULL) { + /* our filter hasn't been added yet */ + ctx = apr_pcalloc(r->pool, sizeof(*ctx)); + ap_add_output_filter("OLD_WRITE", ctx, r, r->connection); + f = r->output_filters; + } + + /* if the first filter is not our buffering filter, then we have to + * deliver the content through the normal filter chain + */ + if (f != r->output_filters) { + apr_bucket_brigade *bb = apr_brigade_create(r->pool, c->bucket_alloc); + apr_bucket *b = apr_bucket_transient_create(str, len, c->bucket_alloc); + APR_BRIGADE_INSERT_TAIL(bb, b); + + return ap_pass_brigade(r->output_filters, bb); + } + + /* grab the context from our filter */ + ctx = r->output_filters->ctx; + + if (ctx->bb == NULL) { + ctx->bb = apr_brigade_create(r->pool, c->bucket_alloc); + } + + return ap_fwrite(f->next, ctx->bb, str, len); +} + +AP_DECLARE(int) ap_rputc(int c, request_rec *r) +{ + char c2 = (char)c; + + if (r->connection->aborted) { + return -1; + } + + if (buffer_output(r, &c2, 1) != APR_SUCCESS) + return -1; + + return c; +} + +AP_DECLARE(int) ap_rputs(const char *str, request_rec *r) +{ + apr_size_t len; + + if (r->connection->aborted) + return -1; + + if (buffer_output(r, str, len = strlen(str)) != APR_SUCCESS) + return -1; + + return len; +} + +AP_DECLARE(int) ap_rwrite(const void *buf, int nbyte, request_rec *r) +{ + if (r->connection->aborted) + return -1; + + if (buffer_output(r, buf, nbyte) != APR_SUCCESS) + return -1; + + return nbyte; +} + +struct ap_vrprintf_data { + apr_vformatter_buff_t vbuff; + request_rec *r; + char *buff; +}; + +static apr_status_t r_flush(apr_vformatter_buff_t *buff) +{ + /* callback function passed to ap_vformatter to be called when + * vformatter needs to write into buff and buff.curpos > buff.endpos */ + + /* ap_vrprintf_data passed as a apr_vformatter_buff_t, which is then + * "downcast" to an ap_vrprintf_data */ + struct ap_vrprintf_data *vd = (struct ap_vrprintf_data*)buff; + + if (vd->r->connection->aborted) + return -1; + + /* r_flush is called when vbuff is completely full */ + if (buffer_output(vd->r, vd->buff, AP_IOBUFSIZE)) { + return -1; + } + + /* reset the buffer position */ + vd->vbuff.curpos = vd->buff; + vd->vbuff.endpos = vd->buff + AP_IOBUFSIZE; + + return APR_SUCCESS; +} + +AP_DECLARE(int) ap_vrprintf(request_rec *r, const char *fmt, va_list va) +{ + apr_size_t written; + struct ap_vrprintf_data vd; + char vrprintf_buf[AP_IOBUFSIZE]; + + vd.vbuff.curpos = vrprintf_buf; + vd.vbuff.endpos = vrprintf_buf + AP_IOBUFSIZE; + vd.r = r; + vd.buff = vrprintf_buf; + + if (r->connection->aborted) + return -1; + + written = apr_vformatter(r_flush, &vd.vbuff, fmt, va); + + /* tack on null terminator on remaining string */ + *(vd.vbuff.curpos) = '\0'; + + if (written != -1) { + int n = vd.vbuff.curpos - vrprintf_buf; + + /* last call to buffer_output, to finish clearing the buffer */ + if (buffer_output(r, vrprintf_buf,n) != APR_SUCCESS) + return -1; + + written += n; + } + + return written; +} + +AP_DECLARE_NONSTD(int) ap_rprintf(request_rec *r, const char *fmt, ...) +{ + va_list va; + int n; + + if (r->connection->aborted) + return -1; + + va_start(va, fmt); + n = ap_vrprintf(r, fmt, va); + va_end(va); + + return n; +} + +AP_DECLARE_NONSTD(int) ap_rvputs(request_rec *r, ...) +{ + va_list va; + const char *s; + apr_size_t len; + apr_size_t written = 0; + + if (r->connection->aborted) + return -1; + + /* ### TODO: if the total output is large, put all the strings + * ### into a single brigade, rather than flushing each time we + * ### fill the buffer + */ + va_start(va, r); + while (1) { + s = va_arg(va, const char *); + if (s == NULL) + break; + + len = strlen(s); + if (buffer_output(r, s, len) != APR_SUCCESS) { + return -1; + } + + written += len; + } + va_end(va); + + return written; +} + +AP_DECLARE(int) ap_rflush(request_rec *r) +{ + conn_rec *c = r->connection; + apr_bucket_brigade *bb; + apr_bucket *b; + + bb = apr_brigade_create(r->pool, c->bucket_alloc); + b = apr_bucket_flush_create(c->bucket_alloc); + APR_BRIGADE_INSERT_TAIL(bb, b); + if (ap_pass_brigade(r->output_filters, bb) != APR_SUCCESS) + return -1; + + return 0; +} + +/* + * This function sets the Last-Modified output header field to the value + * of the mtime field in the request structure - rationalized to keep it from + * being in the future. + */ +AP_DECLARE(void) ap_set_last_modified(request_rec *r) +{ + if (!r->assbackwards) { + apr_time_t mod_time = ap_rationalize_mtime(r, r->mtime); + char *datestr = apr_palloc(r->pool, APR_RFC822_DATE_LEN); + + apr_rfc822_date(datestr, mod_time); + apr_table_setn(r->headers_out, "Last-Modified", datestr); + } +} + +AP_IMPLEMENT_HOOK_RUN_ALL(int,post_read_request, + (request_rec *r), (r), OK, DECLINED) +AP_IMPLEMENT_HOOK_RUN_ALL(int,log_transaction, + (request_rec *r), (r), OK, DECLINED) +AP_IMPLEMENT_HOOK_RUN_FIRST(const char *,http_method, + (const request_rec *r), (r), NULL) +AP_IMPLEMENT_HOOK_RUN_FIRST(unsigned short,default_port, + (const request_rec *r), (r), 0) |